Just purchased 16GB of G.Skill Ripjaw X Series 1866 DDR3 RAM. When I first popped them and booted to BIOS they were already set to 1866. I booted to OS and checked Speccy to make sure they were still running at 1866 which they were.
I rebooted an hour or so later and they are now running 1466 it appears... I also noticed the latencies changed from 10-10-9-24 to 9-9-9-24... very odd.
The RAM is 1866 9-10-9-27 stock I believe.
Attached are a few Speccy screens of my RAM
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/Speccy%20RAM%201_zpst5q9bjeb.png
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/speccy%20RAM%202_zpsk1id2z6y.png
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/Speccy%20RAM%203_zpsugi3dgjw.png
I rebooted an hour or so later and they are now running 1466 it appears... I also noticed the latencies changed from 10-10-9-24 to 9-9-9-24... very odd.
The RAM is 1866 9-10-9-27 stock I believe.
Attached are a few Speccy screens of my RAM
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/Speccy%20RAM%201_zpst5q9bjeb.png
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/speccy%20RAM%202_zpsk1id2z6y.png
http://i30.photobucket.com/albums/c330/cwburns518/Mobile%20Uploads/Speccy%20RAM%203_zpsugi3dgjw.png